However, US President Donald Trump said he would continue to exert maximum pressure on North Korea, as he prepares to meet Mr Kim in the coming weeks. "We're not going to be played, OK?" he said. "We're going to hopefully make a deal." After the talks at the border, Mr Kim and Mr Moon also agreed to push towards turning the armistice, which ended the Korean War in 1953, into a peace treaty this year. The summit came just months after warlike rhetoric from North Korea. Details of how denuclearisation would be achieved were not made clear, and many analysts remain sceptical about the North's apparent enthusiasm for engagement.
An issue for the North is the security guarantee extended by the US, a nuclear power, to South Korea and Japan and its military presence in both countries. Previous inter-Korean agreements have included similar pledges but were later abandoned after the North resorted to nuclear and missile tests and the South elected more conservative presidents. Mr Kim said the two leaders had agreed to work to prevent a repeat of the region's "unfortunate history" in which progress had "fizzled out". "There may be backlash, hardship and frustration," he said, adding: "A victory cannot be achieved without pain." The commitment to denuclearisation does not explicitly refer to North Korea halting its nuclear activities but rather to the aim of "a nuclear-free Korean peninsula".
China later praised the political determination and courage of both leaders and said it hoped the momentum could be maintained. President Trump also welcomed the news, tweeting that "good things are happening". Speaking in Washington, Mr Trump said his expected meeting with Mr Kim would take place in one of two countries under consideration and vowed he would not be "played" by the North Korean leader. "We will come up with a solution and if we don't we'll leave the room," he said. The leaders were met by an honour guard in traditional costume on the South Korean side.
The pair walked to the Peace House in Panmunjom, a military compound in the DMZ. Mr Kim then invited the South Korean president to step briefly across the demarcation line into North Korea, before the pair stepped back into South Korea - all the while holding hands. It was an apparently unscripted moment during a highly choreographed sequence of events.
The two leaders spoke together during a session broadcast live on South Korean TV. Mr Kim jokingly apologised to Mr Moon for repeatedly forcing him to get up early because of the North's missile and nuclear tests. "I heard you [President Moon] had your early morning sleep disturbed many times to attend National Security Council meetings," he said. "I will make sure that your morning sleep won't be disturbed." "Now I can sleep in peace," Mr Moon replied. Mr Kim also acknowledged that the North's infrastructure lagged behind that of the South. "I'm worried that our transport situation is bad so it may discomfort you, it may be embarrassing [for me] if you visit North Korea after living in the South's environment," he said.
After separating for lunch, the two leaders took part in a tree-planting ceremony using soil and water from both countries. Mr Kim was accompanied for the symbolic discussions by nine officials, including his powerful sister, Kim Yo-jong. Few had predicted a development like this, as North Korea continued its nuclear and missile tests and stepped up its rhetoric through 2016 and 2017.
The rapprochement began in January when Mr Kim suggested he was "open to dialogue" with South Korea. The following month the two countries marched under one flag at the opening ceremony of the Winter Olympics, held in the South. Mr Kim announced last week that he was suspending nuclear tests. Chinese researchers have indicated that North Korea's nuclear test site may be unusable after a rock collapse. (UNI)